OnLine Resources

CAS technology resources
TI CAS pages
TI Software upgrades
TI-Nspire Resources Page
Wolfram-Alpha (this is truly an amazing tool!)
The Wolfram Alpha Demonstrations page
Geogebra
Casio Classpad

Other CAS resources (research, blogs, etc.)
Shifting Assessment in a World of CAS (Oct 12, 2010)
The Case for CAS
Lin McMullin's CAS pages
One of Conrad Wolfram's TED talks titled "Teaching kids real math using computers"

CAS Groups
MEECAS
The MEECAS CAS links page
The International CAS-TI & Derive Users Group (DUG) in Austria

Other Technology Groups
TI NSpire Google group
TI Navigator Google group

Non-CAS Web pages (but interesting anyway)
Polynomial Therorems (most of which are not in precalculus textbooks)